Interactive language learning applications using gamification, spaced repetition, and AI-powered speech recognition to teach foreign languages. These platforms make language learning engaging through daily lessons, streaks, leaderboards, and bite-sized content optimized for mobile devices.

Free tier with limited features and ads, premium subscriptions removing ads and unlocking unlimited lessons, offline access, and advanced features. Additional revenue from in-app purchases and language certification fees.

• DAU

  Daily active users completing at least one lesson

• Lesson completion

  Percentage of started lessons that are completed

• Retention

  7-day and 30-day user retention rates

Duolingo, Babbel, 밀당영어